Inductoheat, Inc.

Timothy Gerard Boussie

Valery I Rudnev

Gary A Doyon

Glenville Colin Desmier

Don L Loveless

Douglas R Brown

Robert J Madeira

A master inductor circuit is connected to an alternating current power source and a passive inductor circuit are assembled as a separable split inductor assembly to form at least one pair of a master heating inductor and a passive heating inductor where the master and passive inductor circuits are electromagnetically coupled without physical connection. A bearing component can be brought into the presence of the magnetic flux field created by the master and passive heating inductors to simultaneously induction heat one or more bearing features on the bearing component with subsequent quenching down austenitized bearing features on the bearing component.

Split multiple coil electric induction heat treatment systems for simultaneous heating of multiple features of a bearing component

Apparatus and method are provided for induction heating of one or more components of a complex-shaped workpiece. The component is positioned within an opening formed by opposing pairs of arcuate coil structures formed in opposing inductor segments. One inductor segment is formed from electrically isolated inner and outer active inductor segments connected to one or more power supplies, while the other inductor segment is formed from electrically isolated inner and outer passive inductor segments that are magnetically coupled with respective inner and outer active inductor segments. Changing the output electrical parameters of the one or more power supplies controls the induction hardening along the transverse width of the workpiece with optional flux concentrators between opposing pairs of arcuate coil structures.

Induction heat treatment of complex-shaped workpieces

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Sterling Heights, MI, United States of America

Timothy Gerard Boussie